/
metadata.go
51 lines (44 loc) · 877 Bytes
/
metadata.go
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package event
import (
"fmt"
"strings"
)
// Metadata metadata
type Metadata map[string]string
func NewMetadata() Metadata {
return Metadata{}
}
// Get returns the metadata value for the provided key.
func (m Metadata) Get(key string) string {
if v, ok := m[key]; ok {
return v
}
return ""
}
// Set sets the metadata key to provided value.
func (m Metadata) Set(key, value string) Metadata {
m[key] = value
return m
}
// Convert metadata to string
func (m Metadata) String() string {
if m == nil {
return ""
}
vals := make([]string, 0, len(m))
for key, val := range m {
vals = append(vals, fmt.Sprintf("%s=%s", key, val))
}
return fmt.Sprintf("Metadata{%s}", strings.Join(vals, ", "))
}
// Copy metadata
func (m Metadata) Copy() Metadata {
if len(m) == 0 {
return nil
}
m1 := Metadata{}
for key, val := range m {
m1[key] = val
}
return m1
}